<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
h2,
p {
    margin: 0;
}    
.box {
    margin: 30px auto;
    width: 300px;    
}
#user,
#message {
    box-sizing: border-box;
    width: 300px;
    border: 1px solid #000;
    padding: 10px;
    height: 100px;
    resize: none;
    display: block;
}
#user {
    padding: 0 10px;
    height: 30px;
    margin-bottom: 10px;
}
#btn {
    display: block;
    margin: 10px auto;
    width: 60%;
    height: 40px;
}
#list {
    border-top: 1px solid #000;
    padding: 10px 0 0;
    margin: 0;
    list-style: none;
}
#list li {
    position: relative;
    font: 14px/30px "宋体";
    border-bottom: 1px solid #000;
    padding: 0 15px;
    overflow: hidden;
}
.clos {
    position: absolute;
    right: 5px;
    top: 10px;
}
.clos2 {
    position: absolute;
    right: 5px;
    top: 30px;
}
/* .replay{
    position:absolute;
    right: 5px;
    top: 35px;
} */
.mask{
    width: 100vw;
    height: 100vh;
    background: black;
    opacity: .3;
    position: absolute;
    left: 0;
    top: 0;
    display: none;
}
.comfirm{
    width: 200px;
    height: 120px;
    background: white;
    text-align: center;
    position: absolute;
    left: 50%;
    top: 30%;
    border-radius: 5px;
    transform: translate(-50%,-50%);
    overflow: hidden;
    display: none;
    
}
.comfirm button{
    /* position: absolute; */
    /* right: 10px; */
    float:right;
    margin-top: 20px;
    margin-right: 10px;
}

</style>
</head>
<body>
<div class="box">
    <input type="text" id="user" value="小明" />
    <textarea id="message">我就是传说中的无敌小明</textarea>
    <button id="btn">提交留言</button>
    <ul id="list">
        <li style="height: auto">
            <h2 class="user">小王说:</h2>
            <p>呼叫无敌小明</p>
            
            <a href="javascript:;" class="clos">删除</a>
            <a href="javascript:;" class="clos2">回复</a>
        </li>
        <li style="height: auto">
            <h2 class="user">老师说:</h2>
            <p>小明滚出去</p>
            <p>回复的内容</p>
            <a href="javascript:;" class="clos">删除</a>
        </li>
    </ul>
    
   
</div>
<script>
    // 留言板 功能
    // 一、添加 、删除功能 
    // 添加功能 ；
    var btn = document.querySelector("#btn");
    var usernameEle = document.querySelector("#user");
    var messageEle = document.querySelector("#message");
    var listEle = document.querySelector("#list");

     // 清空 ul里的静态数据
    listEle.innerHTML = "";
    btn.onclick = function(){
        var username = usernameEle.value;
        var message = messageEle.value;
        console.log(username,message);
        // 点击添加的时候组装 li 添加到ul里
        var liEle = document.createElement("li");
        liEle.style.height = "auto";
        liEle.innerHTML = `<h2 class="user">${username}说:</h2>
                            <p>${message}</p>
                            <a href="javascript:;" class="clos">删除</a>
                            <a href="javascript:;" class="clos2">回复</a>
                            <p style="display:none"><input /> <button class="sure">确定</button><button class="cancel">取消</button></p>
                            `;
        // 创建li的时候获取li元素里的删除按钮 
        var delEle = liEle.querySelector(".clos");

        delEle.onclick = function(){
            // console.log("点击了");
            this.parentNode.remove();
        }

        // 创建li的时候获取回复按钮 
        var replayELe = liEle.querySelector(".clos2");
        replayELe.onclick = function(){
            console.log("点击了回复",this);
            this.nextElementSibling.style.display = "block";
            // 获取取消 按钮 
            this.nextElementSibling.querySelector(".cancel").onclick = function(){
                console.log("点击了取消按钮");
                this.parentNode.style.display = "none";
            }

            // 获取确定回复按钮 ，绑定点击事件
            this.nextElementSibling.querySelector(".sure").onclick = function(){
                console.log("点击了确定按钮");
                // 获取回复的内容添加到指定位置 ；
                // 获取input 输入框 
                var inputEle = this.previousElementSibling;
                // console.log(inputEle);
                var val = inputEle.value;
                
                var pEle = document.createElement("p");
                pEle.innerHTML = val;
                // 把获取到的内容添加到li的后面；
                liEle.appendChild(pEle);
                this.parentNode.style.display = "none";
            }


        }

        listEle.appendChild(liEle);
    }

   








</script>
</body>
</html>